iPad Pro has black scene after update to 27.0

The nature of your issue is unclear. Without a clear understanding as to the nature of your potential problem, it is impossible for contributors here to offer targeted advice or suggestions that might address your difficulty.

Consider posting a screenshot along with a full description of the problem - along with what you expect to see. You can upload a screenshot (suitably redacted, using markup tools, to obscure any personal or sensitive information) using the image button found at the bottom of the message editing window:

That aside, perhaps you have enabled Dark Mode - or this setting unexpectedly changed when updating your iPad:

Settings > Appearance - select Light or Dark mode as preferred

You should note that if Automatic is also selected, the appearance will automatically switch between Light and Dark mode at certain times of the day.